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Energy Calculators

Tools to manage your energy use.

To make sure your business gets the most out of every energy dollar our engineers have assembled these electronic energy analysis calculators.

How to use them:

  1. Download the document to your computer by right clicking on it, then clicking "Save Target As."
  2. Open the document and follow the steps on the spreadsheet, filling in the appropriate information as best you can.
  3. Once you have the information completed, save the document and e-mail it to us at One of our engineers will review the document and get back to you with suggestions for increasing your energy efficiency.
  4. If you have questions, just send them along to the e-mail address above.

Energy Calculator Information
Lighting Analysis  A well-designed lighting retrofit project can reduce lighting energy costs by 40-60 percent, and sometimes more. These savings are achieved by a combination of replacing the primary working components within light fixtures (i.e. newer energy-efficient lamps and ballasts); redesigning fixtures for a different configuration of lamps, ballasts, and reflectors; and replacing existing fixtures with new, more efficient ones. This analysis tool provides valuable information for determining the viability of a lighting retrofit for a facility.
Variable Frequency Drives (VFD) Variable frequency (also called adjustable speed) drives provide energy savings by allowing a motor to adjust its speed relative to the power input requirements. By controlling motor speed to varying load requirements, VFD installations can increase energy efficiency, improve power factor and afford other performance benefits such as soft starting and over speed capability. This analysis tool can provide cost/benefit information for installing a VFD in a variety of applications.
Refrigeration CommRefrigEval is an Excel workbook model designed to estimate the possible energy and energy cost savings from a variety of measures applicable to commercial refrigeration systems, particularly supermarket refrigeration systems. The intent of this workbook model is to provide a snap shot of operations and to identify applications that have a high potential for energy savings. CommRefrigEval is designed for consulting engineers, utility energy services engineers and facilities engineers.
Operation and Maintenance (O & M) Tool

A common question asked by customers is whether it is economical to shut down a piece of equipment during breaks, or not. A full-blown analysis is time consuming because of the number of variables that could be involved in this decision. A tool to provide a rough idea as to the practicality of such a decision by providing an estimate of its operating costs would be handy. The O & M Tool primarily allows you to input data for motor driven equipment in the wood products industry (chippers, air compressors, hogs, etc.) and to determine its approximate cost of operation based on typical factors found in the industry. However, any motor load can be estimated if the load factor can be determined.

For a more detailed analysis of a motor, try the Motor Master Program released by the DOE.

Compressed Air In the U.S., compressed air systems account for $1.5 billion per year in energy costs, and 0.5 percent of emissions. Many industries use compressed air systems as power sources for tools and equipment used for pressurizing, atomizing, agitating, and mixing applications. Optimization of compressed air systems can provide energy efficiency improvements of 20 to 50 percent. However, in order to determine the optimal operation of your system, it will require the profiling of the system flow and power requirements. The AirMaster+ software, provided free of charge by the DOE, will provide comprehensive information on assessing compressed air systems, including modeling, existing and future system upgrades, and evaluating savings and effectiveness of energy efficiency measures.
Pumping System Assessment Tool The Pumping System Assessment Tool, software provided free of charge by the DOE, will help you evaluate the value of looking at a pump system for your business. Input data and compare findings to like-kind systems. You can use this data to decide whether you want to take a closer look at a particular pumping system.
Unless noted otherwise, all of the evaluation tools ("E.Tools") provided herein are the intellectual property of Avista Utilities and are protected by copyright law. You are granted a limited, non-sublicensable right to download the tools for personal and informational use only. In particular the foregoing license grant does NOT include the right for you to market, sell or make commercial use of the E-tools, distribute the E.Tools to any third party, or make derivative uses of the E.Tools.

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